EP2108202B1 - Sekundärbatterie mit verbesserter sicherheit - Google Patents

Sekundärbatterie mit verbesserter sicherheit Download PDF

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Publication number
EP2108202B1
EP2108202B1 EP08704811.2A EP08704811A EP2108202B1 EP 2108202 B1 EP2108202 B1 EP 2108202B1 EP 08704811 A EP08704811 A EP 08704811A EP 2108202 B1 EP2108202 B1 EP 2108202B1
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EP
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Prior art keywords
lithium
containing metal
metal composite
composite oxide
cathode
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EP08704811.2A
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English (en)
French (fr)
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EP2108202A1 (de
EP2108202A4 (de
Inventor
Pil-Kyu Park
Young-Sun Park
Byung-Hun Oh
Ki-Tae Kim
Myoung-Hun Lee
Jae-Won LG Chem Reasearch Park LEE
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LG Chem Ltd
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LG Chem Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making

Definitions

  • the present invention relates to a secondary battery in which, when a short circuit occurs, the instantaneous flow of large amounts of electrons and lithium ions can be suppressed, thus ensuring excellent safety of the battery.
  • lithium-containing metal composite oxide e.g., LiCoO 2
  • anode active material a carbon material
  • the above-described cathode active material having high potential versus lithium is used alone, when a short circuit occurs in the battery due to internal or external conditions, electrons and lithium ions will rapidly migrate from the anode to the cathode, and thus a large amount of current will instantaneously flow, which leads to rapid heat generation in the battery, thus causing problems such as battery ignition and explosion.
  • Cu copper
  • a solution of 1M LiPF 6 in EC/EMC (1:2 v/v) was used as an electrolyte.
  • a polyolefin-based separator was interposed between the fabricated cathode and anode, and then the electrolyte was injected into the resulting assembly, thus fabricating a battery.
  • a battery was fabricated in the same manner as in Example 1, except that LiCoO 2 and LiFePO 4 were used at a weight ratio of 85 : 15 instead of 80 : 20.
  • the differences in potential and impedance between the cathode active materials are shown in Table 1 below.
  • the secondary batteries comprising the inventive cathode, comprising two or more cathode active materials having different potentials versus lithium and different impedances, were subjected to nail penetration (60 °C, 4.3V and 0.3 m/min).
  • the secondary battery according to the present invention comprises the cathode comprising two or more cathode active materials, which have different potentials versus lithium and different impedances.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Claims (9)

  1. Kathode, die zwei oder mehrere Lithium-enthaltende Metall-Mischoxide umfasst, die unterschiedliche Potentiale gegenüber Lithium (Li/Li+) und unterschiedliche Impedanzen aufweisen, wobei die Kathode folgendes umfasst:
    (a) ein erstes Lithium-enthaltendes Metall-Mischoxid; und
    (b) ein zweites Lithium-enthaltendes Metall-Mischoxid, das im Vergleich zum ersten Lithium-enthaltenden Metall-Mischoxid eine hohe Impedanz und ein niedriges Potential gegenüber Lithium (Li/Li+) aufweist,
    wobei die Kathode eine Struktur aufweist, in der das erste Lithium-enthaltende Metall-Mischoxid und das zweite Lithium-enthaltende Metall-Mischoxid in der Kathode gleichförmig miteinander vermischt sind;
    das zweite Lithium-enthaltende Metall-Mischoxid auf einem Teil der oder seiner gesamten Oberfläche mit einem leitfähigen Material beschichtet ist;
    wobei das zweite Lithium-enthaltende Metall-Mischoxid LiFePO4 ist; und
    wobei das Verhältnis der elektrischen Leitfähigkeit zwischen dem ersten Lithium-enthaltenden Metall-Mischoxid und dem zweiten Lithium-enthaltenden Metall-Mischoxid in einem Bereich von 10-1 bis 10-7 liegt.
  2. Kathode nach Anspruch 1, wobei das Potential des ersten Lithium-enthaltenden Metall-Mischoxids gegenüber Lithium (Li/Li+) über 3,7 V liegt und das Potential des zweiten Lithium-enthaltenden Metall-Mischoxids gegenüber Lithium (Li/Li+) unter 3,7 V liegt.
  3. Kathode nach Anspruch 1, wobei die Differenz (ΔP) des Potentials gegenüber Lithium (Li/Li+) zwischen dem ersten Lithium-enthaltenden Metall-Mischoxid und dem zweiten Lithium-enthaltenden Metall-Mischoxid bei 0,3 V < ΔP < 5 V liegt.
  4. Kathode nach Anspruch 1, wobei das leitfähige Material ein Kohlenstoffmaterial ist.
  5. Kathode nach Anspruch 1, wobei das Gewichtsverhältnis des ersten Lithium-enthaltenden Metall-Mischoxids zum zweiten Lithium-enthaltenden Metall-Mischoxid im Bereich von 70-95:5-30 liegt.
  6. Kathode nach Anspruch 1, wobei die Partikelgröße (D50) der Partikel des ersten Lithium-enthaltenden Metall-Mischoxids im Bereich von 5-20 µm liegt und die Partikelgröße (D50) des zweiten Lithium-enthaltenden Metall-Mischoxids von 50 nm bis 10 µm reicht.
  7. Kathode nach Anspruch 1, wobei das erste Lithium-enthaltende Metall-Mischoxid aus einem oder mehreren besteht, ausgewählt aus LiMO2 (M = Co, Mn, Ni1/3Co1/3Mn1/3, Cr oder V) und LiMO4 (M = CoMn, NiV, CoV, CoP, MnP oder Mn2).
  8. Sekundärbatterie, die eine Kathode, eine Anode, einen Elektrolyten und einen Separator umfasst, wobei die Kathode eine Kathode gemäß einem der Ansprüche 1 bis 7 ist.
  9. Sekundärbatterie nach Anspruch 8, die eine Lithium-Sekundärbatterie ist.
EP08704811.2A 2007-01-24 2008-01-16 Sekundärbatterie mit verbesserter sicherheit Active EP2108202B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20070007406 2007-01-24
PCT/KR2008/000275 WO2008091074A1 (en) 2007-01-24 2008-01-16 A secondary battery with improved safety

Publications (3)

Publication Number Publication Date
EP2108202A1 EP2108202A1 (de) 2009-10-14
EP2108202A4 EP2108202A4 (de) 2011-08-10
EP2108202B1 true EP2108202B1 (de) 2017-03-08

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US (1) US20100112445A1 (de)
EP (1) EP2108202B1 (de)
JP (1) JP5558109B2 (de)
KR (1) KR100993436B1 (de)
CN (2) CN101578724A (de)
TW (1) TW200843163A (de)
WO (1) WO2008091074A1 (de)

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Publication number Publication date
CN104466084B (zh) 2017-09-15
CN101578724A (zh) 2009-11-11
TW200843163A (en) 2008-11-01
KR20080069930A (ko) 2008-07-29
KR100993436B1 (ko) 2010-11-09
CN104466084A (zh) 2015-03-25
WO2008091074A1 (en) 2008-07-31
JP5558109B2 (ja) 2014-07-23
EP2108202A1 (de) 2009-10-14
US20100112445A1 (en) 2010-05-06
JP2010517238A (ja) 2010-05-20
EP2108202A4 (de) 2011-08-10

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